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Table 4 Distribution of scores and reliability coefficients for the WHODAS-2 and SF-36 domains

From: Validation of the "World Health Organization Disability Assessment Schedule, WHODAS-2" in patients with chronic diseases

  Mean SD Observed Range Missing domain (%) Floor (%) Ceiling (%) Cronbach's alpha ICC (n = 404)
WHODAS-2          
   Understanding and Communicating 17.9 20.9 (0.0 - 100.0) 2.7 0.6 29.1 0.88 0.612
   Getting Around 27.8 27.1 (0.0 - 100.0) 2.8 1.0 25.4 0.80 0.197
   Self Care 14.4 21.2 (0.0 - 100.0) 2.8 0.3 53.6 0.77 0.524
   Getting along with people 18.9 23.3 (0.0 - 100.0) 5.0 1.2 36.1 0.81 0.642
   Life Activities: household 37.7 34.4 (0.0 - 100.0) 13.3 11.1 24.8 0.94 0.680
   Life Activities: work or school 37.9 38.1 (0.0 - 100.0) 50.2 19.8 27.3 0.98 0.690
   Participation in Society 28.1 21.0 (0.0 - 91.7) 5.2 0.0 10.9 0.82 0.693
   Global 24.8 19.3 (0.0 - 93.5) 15.2 0.0 3.6 0.95 0.738
SF-36          
   Physical Functioning 65.4 29.8 (0.0 - 100.0) 4.5 4.6 10.8 0.94 0.88* 0.791
   Role Physical 49.0 42.0 (0.0 - 100.0) 4.4 33.4 30.5 0.85 0.96* 0.696
   Role Emotional 60.3 41.0 (0.0 - 100.0) 5.0 22.6 43.2 0.87 0.83* 0.556
   Social Functioning 64.9 29.0 (0.0 - 100.0) 3.3 4.0 23.4 0.68 0.78* 0.533
   Mental Health 61.2 21.2 (0.0 - 100.0) 5.1 0.7 1.4 0.78 0.87* 0.714
   Bodily Pain 57.6 29.5 (0.0 - 100.0) 3.3 2.1 21.3 0.83 0.88* 0.610
   Vitality 50.9 21.8 (0.0 - 100.0) 5.0 1.8 0.8 0.84 0.94* 0.684
   General Health 53.4 21.3 (0.0 - 100.0) 5.6 0.9 0.5 0.82 0.87* 0.759
   PCS 42.0 11.2 (13.3 - 71.6) 8.0 --- --- --- --- 0.782
   MCS 43.5 13.1 (-0.2 - 72.8) 8.0 --- --- --- --- 0.676
  1. †SF-36 version 1 (TBI, IHD, Migraine, Parkinson, MS, stroke, musculoskeletal): n = 993
  2. *SF-36 version 2 (bipolar y depression): n = 198
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